webgl.js

https://stackoverflow.com/questions/48011613/rendering-webgl-image-in-headless-chrome-without-a-gpu
(function(){
  var __getContext=HTMLCanvasElement.prototype.getContext;
  Object.defineProperty(HTMLCanvasElement.prototype,'getContext',{
    configurable: true,
    enumerable: true,
    value: function getContext(contextType, contextAttributes={}){
      var options={
        premultipliedAlpha: false
      }
      return __getContext.call(this,contextType,Object.assign({},contextAttributes,options))
    },
    writable: true
  });
}());